Improvement in check-valves



yrrrc JOHN RANDOLPH SEES, OF NEW YORK, N. Y., ASSIGNOR TO WILLIAM F.

WTEAVER, OF PHILADELPHIA, PENNSYLVANIA.

IMPROVEMENT IN CHECK-VALVES.

Specification forming part of Letters Patent No. @2j/JH. dated April 26, 1864.

To all whom it may concern.-

Beit known that 1, JOHN RANDOLPH Sans, of the city of New York, in the State of New York, have invented a certain new, useful, and Improved Valve for Feed-VVater Pipes, Sac.; and I do hereby declare the following to be a full, clear, and exact description thereof, reference being had tothe accompanying drawings, and to the letters and marks thereon.

Figure 1 of the drawings forming part of this specification is a side view of the rear end of a locomotive-boiler, the heating feedwater pipes being within the smoke-box d, the lower end thereof being in communication with the check-valve chamber b, through which the feed-water passes by a pipe, c, and the upper end thereof being in communication with the water space of the boiler by a pipe, d. The point of attachment of the pipe from the feed pump is marked c.

`A check-valve is shown within the valvechamber b, also shown detached by Fig. 2, and within the chamber b by Fig. 3.

A circulating-pipe. j', passes out of the top of the valvel chamber to the waterspace of the boiler, for the purpose of keeping up a circulation ot' water through the heating pipes when the supply of water to them from the feed pump is shut oft". As shown in Figs. 1 and 3, the valve rests on its lower seat, indieating the circulation of water through the pipe f. When the water is passing through the chamber by the action of the feed-pump, the valve Will be against its upper seat. This upper seat, x, as is shown by Fig. 3, is so made that it can be removed. It is turned to fit the shell of the valveseat, and admits ot' being removed at pleasure for the purpose of turning off the ends or packing under it for the purpose of altering the lift ot' the valve. lhe grinding down of the valve has been the usual means of altering the lift, but by this improvement the upper seat alone is altered, which can be done in afew moments, and thus the necessity of touching the valve obviated.

My improvement relates tothe valve and the removable seat, which, though specially designed for heating feed-water pipes or the valve-chamber thereof, may be used in other pipes or pieces of apparatus and for other purposes.

The valve g is cylindrical, with recessed ends hand i, and with a groove or depression, j, around the central portion of it. Studs or projections 7c at each end of the valve or ribs o in the chamber guide it and keep the space perfect between it and the sides of the valvechamber. The valve may be made of any material and in any manner applicable to valves generally. The advantages of this valve are, that while the groovej gives an iucreased surface for the water, it also performs a special function. Should the water have a tendency to come back from the heater on entering the valve-chamber, it would strike the groove and lift the valve on the upper seat for a moment, and check its further passage until the column of water was again com plete, and then would resume its circulation. The only time it has a tendency to do so is when getting up steam and the heater is much hotter than the boiler, but as soon as vapor forms in the boiler this will not happen. The recessed ends h and i serve as cushioningsurfaces, the air of the Water and the water between the ends of the valve and its seats being the cushioning materials.

As a check-valve, this valve will not be as liable to breakage from the action ot' the pump as many other valves, while it will Work smooth and be free from slamming.

What I claim as my invention, and desiie to secure by Letters Patent, is-

l. rI he valve g, with recessed ends 7L and e' and with a groove or depressioinj, :and susceptible of being operated substantially as herein set forth.

2. In c mbiuatio'n With a check-valve con` structed as herein described, the remoi able seat, forthe purposes herein recited.

This speciication signed this 30th day of September, 1863.

JOHN RANDOLPH SEES.

Witnesses:

THos. T. EvERnT'r, J osEPH H. SPRINGER. 

